Analysis of the effects of inbreeding on lifespan and starvation resistance in Drosophila melanogaster

Valtonen, Terhi M.; Roff, Derek A.; Rantala, Markus J.

doi:10.1007/s10709-011-9574-0

Cited by 10 publications

(5 citation statements)

References 108 publications

(125 reference statements)

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“…We show that in a natural population of the ant F. exsecta, inbreeding does not translate into higher mortality upon starvation, which is consistent with previous findings in D. melanogaster [17,50,51]. In agreement with this, inbreeding did not significantly affect the expression of 8 of the 10 genes studied.…”

Section: Discussionsupporting

confidence: 92%

Starvation resistance and tissue-specific gene expression of stress-related genes in a naturally inbred ant population

et al. 2016

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Starvation is one of the most common and severe stressors in nature. Not only does it lead to death if not alleviated, it also forces the starved individual to allocate resources only to the most essential processes. This creates energetic trade-offs which can lead to many secondary challenges for the individual. These energetic trade-offs could be exacerbated in inbred individuals, which have been suggested to have a less efficient metabolism. Here, we studied the effect of inbreeding on starvation resistance in a natural population of Formica exsecta ants, with a focus on survival and tissue-specific expression of stress, metabolism and immunity-related genes. Starvation led to large tissue-specific changes in gene expression, but inbreeding had little effect on most of the genes studied. Our results illustrate the importance of studying stress responses in different tissues instead of entire organisms.

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Section: Discussionsupporting

confidence: 92%

Starvation resistance and tissue-specific gene expression of stress-related genes in a naturally inbred ant population

et al. 2016

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“…A growing number of empirical studies have reported that inbreeding may have profound impact on the fitness-related traits of insects [7]. Inbreeding can have strong negative effects on fitness at all life stage, including larval development time [8], [9], survival [10], [11], adult body size and mass [12], [13], [14], adult lifespan [12], [15], fecundity [15], [16], [17], fertility [18], [19], [20], and even immune function [21]. So far, inbreeding depression has been quantified across a range of fitness-related traits in only a limited number of insect species, for example, fruit flies [10], [16], [20], [22], flour beetles [15], [23], seed beetles [8], [11], [17], [24], and field crickets [4], [18], [21], [25], [26].…”

Section: Introductionmentioning

confidence: 99%

Evidence for Inbreeding Depression and Pre-Copulatory, but Not Post Copulatory Inbreeding Avoidance in the Cabbage Beetle Colaphellus bowringi

Liu

et al. 2014

PLoS ONE

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Inbreeding is known to have adverse effects on fitness-related traits in a range of insect species. A series of theoretical and experimental studies have suggested that polyandrous insects could avoid the cost of inbreeding via pre-copulatory mate choice and/or post-copulatory mechanisms. We looked for evidence of pre-copulatory inbreeding avoidance using female mate preference trials, in which females were given the choice of mating with either of two males, a sibling and a non-sibling. We also tested for evidence of post-copulatory inbreeding avoidance by conducting double mating experiments, in which four sibling females were mated with two males sequentially, either two siblings, two non-siblings or a sibling and a non-sibling in either order. We identified substantial inbreeding depression: offspring of females mated to full siblings had lower hatching success, slower development time from egg to adult, lower survival of larval and pupal stages, and lower adult body mass than the offspring of females mated to non-sibling males. We also found evidence of pre-copulatory inbreeding avoidance, as females preferred to mate with non-sibling males. However, we did not find any evidence of post-copulatory inbreeding avoidance: egg hatching success of females mating to both sibling and non-sibling males were consistent with sperm being used without bias in relation to mate relatedness. Our results suggest that this cabbage beetle has evolved a pre-copulatory mechanism to avoid matings between close relative, but that polyandry is apparently not an inbreeding avoidance mechanism in C. bowringi.

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“…colonies was conducted firstly to mimic a natural setting, where flies frequenting a single cadaver are likely to be related [37], and secondly to observe any developmental differences. Whilst developmental differences have been noted in D. melanogaster [38] this was after thirty generations of inbreeding; far more than conducted here, which resulted in no differences in development. The purpose of correlating morphological development to percentage age, both through the lifecycle and the pupal stage, was to facilitate comparison between species and populations, as well as the use of the same data across a large temperature range.…”

Section: Discussionmentioning

confidence: 64%

Calliphora vicina (Diptera: Calliphoridae) pupae: a timeline of external morphological development and a new age and PMI estimation tool

2014

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The minimum postmortem interval (PMI(min)) is commonly estimated using calliphorid larvae, for which there are established age estimation methods based on morphological and development data. Despite the increased duration and sedentary nature of the pupal stage of the blowfly, morphological age estimation methods are poorly documented and infrequently used for PMI determination. The aim of this study was to develop a timeline of metamorphosis, focusing on the development of external morphology (within the puparium), to provide a means of age and PMI estimation for Calliphora vicina (Rob-Desvoidy) pupae. Under controlled conditions, 1,494 pupae were reared and sampled at regular time intervals. After puparium removal, observations of 23 external metamorphic developments were correlated to age in accumulated degree hours (ADH). Two age estimation methods were developed based on (1) the combination of possible age ranges observed for each characteristic and (2) regression analyses to generate age estimation equations employing all 23 characteristics observed and a subset of ten characteristics most significantly correlated with age. Blind sample analysis indicated that, using the combination of both methods, pupal age could be estimated to within ±500 ADH with 95% reliability.

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Analysis of the effects of inbreeding on lifespan and starvation resistance in Drosophila melanogaster

Cited by 10 publications

References 108 publications

Starvation resistance and tissue-specific gene expression of stress-related genes in a naturally inbred ant population

Starvation resistance and tissue-specific gene expression of stress-related genes in a naturally inbred ant population

Evidence for Inbreeding Depression and Pre-Copulatory, but Not Post Copulatory Inbreeding Avoidance in the Cabbage Beetle Colaphellus bowringi

Calliphora vicina (Diptera: Calliphoridae) pupae: a timeline of external morphological development and a new age and PMI estimation tool

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